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Garden Tractors Discussion Forum

Wheel Horse Electro 12

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07-20-2007 18:54:48

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Trying to help a friend that has a old Wheel Horse Electro 12
Its a 70s model but not sure of the year
Problem is it has no spark
It does have solid state ignition and is a type Ive never seen before
Has a 12 hp koehler on it
Coil is mounted on outside of blower shroud and i see no means of triggering the ignition
My friend has messed with the wiring an i have no clue where they go All this started when he replaced the switch
Where can i get a wiring diagraham for this wheel horse and could someone explain how the ignition system works to me
Ive worked on solid states on Deeres but this ones different
Thanks in advance Gary

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07-21-2007 09:49:36

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 Re: Wheel Horse Electro 12 in reply to chevy65, 07-20-2007 18:54:48  
Thanks for all the replys
All was helpful to me
Thanks again Gary AKA Chevy65

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07-21-2007 06:11:33

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 Re: Wheel Horse Electro 12 in reply to chevy65, 07-20-2007 18:54:48  
You have a solid state ignition on this unit. It has the coil on the outside of the blower housing with a trigger unit on the outside of the flywheel under the blower housing. Do not under any circumstance put 12v to this igntion system, you will burn it up, if it is not already. The parts for that are quite pricy and I have put points on some of them with a battery ignition, never on an Electro 12, but have on a Bronco 14 and it worked good.
Coil should be part number 236826-s-$105.86 and the trigger should be a237339-s--$129.38.
And as said before, this unit has to have the correct switch, if he monkeyed with the wiring and who ever he bought the switch from gave him the wrong one, he might have just spent a whole bunch of money to repair his tractor.

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Wrench Spinner

07-21-2007 05:54:34

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 Re: Wheel Horse Electro 12 in reply to chevy65, 07-20-2007 18:54:48  

Kohler had three ignition systems on the early K series, Two of which were electronic (breaker-less). What you need to do is identify which system you have on this unit.

Jumping battery voltage to either of these breaker-less systems could result in fried components.

You can down-load a service manual below by clicking "Enter as Guest" then follow the prompts. Go to section 8 which will identify these systems and supply proper testing procedures.

Good Luck

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William Pearson

07-20-2007 19:59:05

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 Re: Wheel Horse Electro 12 in reply to chevy65, 07-20-2007 18:54:48  
The Wheel Horse model Electro 12 was made for only three years 1968 , 1969 and 1970.
1968 VIN is 1-7235
1969 VIN is 1-7245
1970 VIN is 1-7255
On the back of the switch you should see 5 terminals.
L = accessory - orange wire
R = rectifier (regulator)- orange wire
S = starter - black wire
M = magneto - black wire
B = battery - black wire
This list is from a 1970 year model Electro 12.
Chances are the incorrect switch was installed shorting out the ignition. Try running a wire straight from the positive post on the battery to the coil to see if there is spark.
Bill in Richmond, Va.

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Dennis in Wisconsin

07-20-2007 19:43:29

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 Re: Wheel Horse Electro 12 in reply to chevy65, 07-20-2007 18:54:48  
Gary Don*t know if I can help but I will give it a try. I think your motor has no points but has what they call a trigger and it is inside the flywheel. Two wires coming out of coil one goes to that trigger and the other one I think goes to ignition switch. If this doesn*t help you try I think thats the one I try. Don*t blow that trigger cause I think I paid almost $100 for it. If I can help you more let me know. Hope this did help a little and good luck********** Dennis in Wisconsin

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